diff --git a/system/HTTP/RedirectResponse.php b/system/HTTP/RedirectResponse.php
index ed620c40f2ae..28b1d13b75eb 100644
--- a/system/HTTP/RedirectResponse.php
+++ b/system/HTTP/RedirectResponse.php
@@ -114,7 +114,7 @@ private function withErrors(): self
 
         if ($validation->getErrors()) {
             $session = Services::session();
-            $session->setFlashdata('_ci_validation_errors', $validation->getErrors());
+            $session->setFlashdata('_ci_validation_errors', serialize($validation->getErrors()));
         }
 
         return $this;
diff --git a/system/Validation/Validation.php b/system/Validation/Validation.php
index c22f38ae2413..a75033a900d8 100644
--- a/system/Validation/Validation.php
+++ b/system/Validation/Validation.php
@@ -729,7 +729,11 @@ public function getError(?string $field = null): string
      */
     public function getErrors(): array
     {
-        return $this->errors;
+        if (empty($this->errors) && ! is_cli() && isset($_SESSION, $_SESSION['_ci_validation_errors'])) {
+            $this->errors = unserialize($_SESSION['_ci_validation_errors']);
+        }
+
+        return $this->errors ?? [];
     }
 
     /**